Fix bugs in SourceManager::computeMacroArgsCache() and add a unit test for it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147057 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index 4aed17ac13..375aea0ee9 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -300,6 +300,11 @@ namespace SrcMgr {
         SourceLocation::getFromRawEncoding(ExpansionLocEnd).isInvalid();
     }
 
+    bool isFunctionMacroExpansion() const {
+      return getExpansionLocStart().isValid() &&
+          getExpansionLocStart() != getExpansionLocEnd();
+    }
+
     /// create - Return a ExpansionInfo for an expansion. Start and End specify
     /// the expansion range (where the macro is expanded), and SpellingLoc
     /// specifies the spelling location (where the characters from the token